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US 8,785,013 B2Granted
Compositions containing modified fullerenes
AssigneeE. I. Du Pont de Nemours and Company
InventorsPaul J. Krusic, Helen S. M. Lu, Zhen-Yu Yang
Life of this patent
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Abstract
Compositions containing modified fullerenes and their use, for example, as films for membranes in electrode assemblies for electrochemical cells and fuel cells such as fuel cells are described.
Claims22
A composition comprising a mixture of (a) a polymer that consists essentially of
- (i) one or more monomers selected from the group consisting of tetrafluoroethylene, hexafluoropropylene, vinyl fluoride, vinylidine fluoride, trifluorethylene, chlorotrifluoroethylene, perfluoro(alkyl vinyl ether);
- and
- (ii) one or more monomers selected from the group consisting of (1) fluorinated vinyl ethers comprising perfluorinated side chains that comprise cation exchange groups selected from the members of the group consisting of carboxylate, phosphonate, imide, sulfonamide and sulfonimide groups;
- and (2) monomers comprising a side chain represented by the structure of the following Formula (IV)
- —(OCF2CFR7)a—OCF2CFR8SO3X (IV)
- wherein R7 and R8 are each independently selected from F or a perfluorinated alkyl group having 1 to 10 carbon atoms, a =0, 1 or 2, and X is H, an alkali metal, or NH4;
- and
- (b) one or more cyclofluoroalkylated fullerene compounds of Formula I
- (C60+2n)(CF2CR1R2)wR3xR4yR5z (I)
- wherein:
- R1 is F;
- R2 is OCF3, CF3, or Cl;
- R3 is a perfluoroalkyl or perfluoroalkylether group;
- R4 is a hydrocarbon alkyl or alkyl ether group;
- R5 is H;
- n is an integer from 0 to 5;
- w is an integer from 1 to 15;
- x is an integer from 0 to 3+n;
- y is an integer from 0 to 3+n;
- and
- z is an integer from 0 to 3+n.
18 more elements
Dependencies are inferred from the claim text.